Демоны пустыни, или Брат Томас

The atmospheric descriptions really drew me in, but I wonder if the location was based on real places or purely fictional. How did the author decide on this particular setting?

Koontz managed to evoke fear while also exploring Brother Odd’s inner struggles. Did that emotional layer enhance the horror for others as it did for me?

The supernatural components felt intertwined with the moral questions the characters face. I'm curious how others interpret this connection.